PD42-1070 Hardware Manual • Hardware Version V1.00 | Document Revision V1.10 • 2018-July-03
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TTL UART high level voltage
V
T T L
H
3.25
5
V
TTL UART output voltage
V
T T L
_
OU T
5
V
Table 11: Operational ratings of optically isolated inputs and TTL UART interface
6.4 Functional Characteristics
Parameter
Description / Value
Control
4-wire interface with Step, Direction, Enable, and Chopper Mode Switch
Step Pulse Width
The step pulse width should be between 2µs and 4µs for maximum frequency.
With a larger step pulse width, for example 50% duty cycle coming from a
frequency generator, the maximum input frequency will be lower at ca. 9kHz.
Communication
2-wire TTL UART interface for configuration, 9600-115200 bps (default 57600
bps)
Driving Mode
spreadCycle and stealthChop chopper modes (selectable with CHOP input),
adaptive automatic current reduction using stallGuard2 and coolStep
Stepping Resolution Full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256 step, default is 1/16 with internal
interpolation to 1/256
Table 12: Functional Characteristics
6.5 Other Requirements
Specifications
Description or Value
Cooling
Free air
Working environment Avoid dust, water, oil mist and corrosive gases, no condensation, no frosting
Working temperature -30° C to +40° C
Table 13: Other Requirements and Characteristics
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